Here's one of a million moments where the camera zooms on Teppei's intense, reddish eyes. I'm guessing, because of the hue of his armor ("Battle gear...ON!") that this is from the Neo sequel, after he and X have gone through some rough times and some enhancements. Teppei is, all told, an interesting guy. He's stubborn and a bit blockheaded, but eventually he comes to understand that sentience is sentience, no matter what sort of form it wears.